New problem out of nowhere.

Several hours into a flight I suddenly get a C HYD Failure and thus lose my Right yaw Dampener and my RAT deploys.

Everything was set up properly prior to this, and I dont have any programed failures, so what happened?

Secondly, how do i fix it mid flight?  All my HYD buttons are set up properly, but Im still getting PRESS warnings.


Any ideas?

I did several cross atlantic flights and had for some of them the same happened to me as well. There seems to be two conditions I had observed for this to happen : use accelerated flight (2x in my case) and center tanks almost empty (when you have the switch illuminated to cut the center pump off) Was it also the case for you ?